Agfa-Book of Photographic Formulae, Ed

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Pinholes or minute white specks are very common, and are caused by small particles of dust settling on the plate or film while it is being handled in loading the plate holder, mak ing the exposure, or developing, th...